Cobalt Alloy 188/ Haynes Alloy 188/ Udimet 188

Technical Data Sheet

Chemical Composition Limits

Weight %

C

Mn

Si

P

S

Cr

Ni

W

La

B

Fe

Co

Alloy 188

0.05-0.15

1.25 max

0.20-0.50

0.02 max

0.015 max

20-24

20-24

13-16

0.02-0.12

0.015

3 max

Bal

Haynes 188 / Udimet alloy 188 is a cobalt based nickel-chromium-tungsten alloy with a small addition of lanthanum to give a very protective scale. Alloy 188 combines excellent high-temperature strength with good resistance to both oxidizing environments up to 2000°F and to sulfate deposit hot corrosion. Alloy 188 has good forming characteristics and is capable of being forged, hot worked or cold worked, althoug it does work-harden very rapidly so frequent intermediate annealing treatments are recommend for complex forming operations. Alloy 188 is supplied solution heat treated at 2150°F and rapid air or water quenched to attain optimum properties. A combination of good fabricability and weldability makes Alloy 188 suitable for a wide number of applications, particularly in gas turbine components such as combustors, flame holders, liners and tranistion ducts.

Disclaimer
Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.